Borough of Princeton Weather Forecast

    • 40
    • 63

    Mostly Sunny

    • 45
    • 65

    Partly Sunny

    • 52
    • 70

    Mostly Sunny

    • 43
    • 74

    Mostly Sunny

    • 44
    • 66

    Mostly Cloudy

    • 51
    • 68

    Chance Rain Showers

    • 52
    • 68

    Chance Rain Showers

Today 27 Oct Mercer

Sunny. Near steady temperature in the lower 60s. Northeast Winds around 5 Mph.

Tonight 27 Oct Mercer

Mostly clear. Patchy fog after midnight. Lows around 40. Light and variable Winds.

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Borough of Princeton Temperature Statistics

October Temperature

Trenton, Mercer County Airport (9.3 miles)

  • Lowest 24 October, 2026

    34 °F

  • Average October

    58.6 °F

  • Highest 2 October, 2026

    87.7 °F

Climate (2021–2026)

Trenton, Mercer County Airport (9.3 miles)

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  • Average Low 2021–2026

    45.9 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    64.5 °F
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